JP7442527B2 - Structure protection sheet, construction method using the same, precast member, and method for manufacturing precast member - Google Patents

Structure protection sheet, construction method using the same, precast member, and method for manufacturing precast member Download PDF

Info

Publication number
JP7442527B2
JP7442527B2 JP2021533107A JP2021533107A JP7442527B2 JP 7442527 B2 JP7442527 B2 JP 7442527B2 JP 2021533107 A JP2021533107 A JP 2021533107A JP 2021533107 A JP2021533107 A JP 2021533107A JP 7442527 B2 JP7442527 B2 JP 7442527B2
Authority
JP
Japan
Prior art keywords
layer
protection sheet
structure protection
concrete
polymer cement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2021533107A
Other languages
Japanese (ja)
Other versions
JPWO2021010456A1 (en
Inventor
則幸 堀内
由起 中島
晃 二宮
昌己 吉田
健太 下谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Keiwa Inc
Original Assignee
Keiwa Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Keiwa Inc filed Critical Keiwa Inc
Publication of JPWO2021010456A1 publication Critical patent/JPWO2021010456A1/ja
Priority to JP2024023811A priority Critical patent/JP2024061725A/en
Application granted granted Critical
Publication of JP7442527B2 publication Critical patent/JP7442527B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • B28B7/364—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article of plastic material or rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/0092—Machines or methods for applying the material to surfaces to form a permanent layer thereon to webs, sheets or the like, e.g. of paper, cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B05D1/286—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers using a temporary backing to which the coating has been applied
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/548—No curing step for the last layer
    • B05D7/5483—No curing step for any layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/0046—Machines or methods for applying the material to surfaces to form a permanent layer thereon to plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/48—Macromolecular compounds
    • C04B41/483—Polyacrylates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
    • C04B41/61—Coating or impregnation
    • C04B41/62—Coating or impregnation with organic materials
    • C04B41/63—Macromolecular compounds
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F3/00—Sewer pipe-line systems
    • E03F3/04—Pipes or fittings specially adapted to sewers
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F3/00—Sewer pipe-line systems
    • E03F3/06—Methods of, or installations for, laying sewer pipes
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203—Arrangements for filling cracks or cavities in building constructions
    • E04G23/0214—Arrangements for filling cracks or cavities in building constructions using covering strips
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04—Lining with building materials
    • E21D11/08—Lining with building materials with preformed concrete slabs
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04—Lining with building materials
    • E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2203/00—Other substrates
    • B05D2203/30—Other inorganic substrates, e.g. ceramics, silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2252/00—Sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B13/12—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B32B2037/243—Coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F3/00—Sewer pipe-line systems
    • E03F3/06—Methods of, or installations for, laying sewer pipes
    • E03F2003/065—Refurbishing of sewer pipes, e.g. by coating, lining

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Organic Chemistry (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Hydrology & Water Resources (AREA)
  • Health & Medical Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Public Health (AREA)
  • Electrochemistry (AREA)
  • Wood Science & Technology (AREA)
  • Laminated Bodies (AREA)
  • Aftertreatments Of Artificial And Natural Stones (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Description

本発明は、構造物保護シート、それを用いた施工方法及びプレキャスト部材、並びに、プレキャスト部材の製造方法に関する。さらに詳しくは、コンクリート等の構造物の表面に保護層を設ける際の工期を大幅に削減できるとともに、構造物を長期にわたって保護することができる構造物保護シート、その構造物保護シートを用いた施工方法及びプレキャスト部材、並びに、プレキャスト部材の製造方法に関する。 The present invention relates to a structure protection sheet, a construction method using the same, a precast member, and a method for manufacturing a precast member. In more detail, we will introduce a structure protection sheet that can significantly reduce the construction period when installing a protective layer on the surface of structures such as concrete, and protect the structure for a long period of time, and construction using the structure protection sheet. The present invention relates to a method, a precast member, and a method for manufacturing a precast member.

道路橋、トンネル、水門等河川管理施設、下水道管きょ、港湾岸壁等の土木構造物は、その老朽化に伴い、補修工事や補強工事が行われる。補修工事は、欠損部分や脆弱部分を補修した後に塗装材を複数回重ね塗りして行われる。一方、補強工事は、補強すべき部分は全体に補強用塗装材を複数回重ね塗りして行われる。 Civil engineering structures such as road bridges, tunnels, water gates, and other river management facilities, sewer pipes, and port quays undergo repair and reinforcement work as they age. Repair work is performed by applying multiple coats of paint after repairing damaged or weak areas. On the other hand, reinforcement work is carried out by applying reinforcing paint multiple times to the entire area to be reinforced.

こうした補修工事や補強工事で施工する重ね塗りは、例えば、コンクリート上に、下塗り、中塗り、上塗りを順に行うが、通常は、中塗りや上塗りは２回又は３回行われる。それぞれの塗り工程は、塗装を乾燥させるために連続して行うことができず、例えば、下塗り、中塗り１回目、中塗り２回目、上塗り１回目、上塗り２回目の計５層の塗装を行う場合は、少なくとも５日間の工期がかかる。しかも、屋外での塗装なので、天候に左右され、雨天では十分な乾燥ができなかったり、塗装工事自体ができないこともある。そのため、工期の短縮が難しく、その分の労務費がかかり、工事費用も高くなってしまう。さらに、塗工膜の品質（膜厚、表面粗さ、含水量等）が、塗り工程時の外部環境（湿度、温度等）によって影響を受ける結果安定したものとなりにくい。 In the case of multiple coatings carried out in such repair work or reinforcement work, for example, a base coat, an intermediate coat, and a top coat are sequentially applied to the concrete, but the intermediate coat and top coat are usually applied two or three times. Each coating process cannot be performed consecutively to dry the coating; for example, a total of 5 layers are applied: base coat, 1st intermediate coat, 2nd intermediate coat, 1st top coat, and 2nd top coat. If so, it will take at least 5 days. Moreover, since the painting is done outdoors, it is affected by the weather, and in rainy weather it may not be possible to dry the paint sufficiently or the painting work itself may not be possible. Therefore, it is difficult to shorten the construction period, which increases labor costs and increases construction costs. Furthermore, the quality of the coating film (film thickness, surface roughness, water content, etc.) is affected by the external environment (humidity, temperature, etc.) during the coating process, and as a result it is difficult to stabilize it.

塗装はこて塗りやスプレー塗り等で行われるが、均一な塗工による安定した補修や補強は、職人の技量に寄るところが大きい。したがって、職人の技量によっても塗工膜の品質はばらつくことになる。さらに、建設従事者の高齢化及び人口の減少に伴い、コンクリートの補修作業や補強作業の従事者が減少している昨今、熟練した職人でなくとも行うことができるより簡易な補修工法が求められている。 Painting is done by troweling or spraying, but stable repair and reinforcement through uniform application depends largely on the skill of the craftsman. Therefore, the quality of the coating film varies depending on the skill of the craftsman. Furthermore, with the aging of construction workers and the decreasing population, the number of people engaged in concrete repair and reinforcement work is decreasing, and there is a need for simpler repair methods that can be performed even by non-skilled craftsmen. ing.

こうした課題を解決する技術として、例えば特許文献１では、簡便で、低費用で、工期が短くなり、確実にコンクリートの劣化を防ぐシート及び方法が提案されている。この技術は、樹脂フィルムを有する中間層とその両面に接着樹脂を介して積層された布帛材料からなる表面層とを備えたコンクリート補修用シートを、補修すべきコンクリート面に施工用接着剤で貼付し、その後、貼付したコンクリート補修用シートのコンクリート面とは反対側の表面層に塗料を塗布する、コンクリートの補修方法である。この特許文献１に代表されるコンクリート補修シートは、樹脂フィルムを基材とし、その基材上に接着剤層を介してシート状の補強部材が設けられている。 As a technique for solving these problems, for example, Patent Document 1 proposes a sheet and method that is simple, inexpensive, shortens the construction period, and reliably prevents deterioration of concrete. This technology uses a construction adhesive to attach a concrete repair sheet to the concrete surface to be repaired, which has an intermediate layer with a resin film and a surface layer made of fabric material laminated on both sides with an adhesive resin. This is a concrete repair method in which paint is then applied to the surface layer of the pasted concrete repair sheet on the opposite side of the concrete surface. The concrete repair sheet typified by Patent Document 1 uses a resin film as a base material, and a sheet-shaped reinforcing member is provided on the base material via an adhesive layer.

なお、塗装材についての改良も行われている。例えば特許文献２には、アルカリ骨材反応を防止し、コンクリート構造物のひび割れに対しても優れた追従性を有し、塗膜形成後の温度上昇によっても塗膜のふくれを発生させず、コンクリートの剥落を防止することを可能にする塗工材料を用いたコンクリート構造物の保護方法が提案されている。この技術は、コンクリート構造物の表面に、下地調整材塗膜を形成させ、その塗膜表面に塗膜を形成させる方法である。下地調整材塗膜は、カチオン系（メタ）アクリル重合体エマルション及び無機質水硬性物質を含有する組成物から形成される。下地調整材塗膜表面に形成される塗膜は、アルキル（メタ）アクリレート系エマルション及び無機質水硬性物質を含有する組成物から形成された塗膜であり、２０℃における伸び率が５０～２０００％であり、遮塩性が１０－２～１０－４ｍｇ／ｃｍ２・ｄａｙであり、水蒸気透過性が５ｇ／ｍ２・ｄａｙ以上であり、膜厚が１００～５０００μｍである。 Additionally, improvements have been made to the coating materials. For example, Patent Document 2 discloses that it prevents alkaline aggregate reactions, has excellent followability against cracks in concrete structures, and does not cause blistering of the paint film even when the temperature rises after the paint film is formed. A method of protecting concrete structures using a coating material that makes it possible to prevent concrete from spalling has been proposed. This technique is a method in which a base conditioner coating film is formed on the surface of a concrete structure, and a coating film is formed on the surface of the coating film. The base conditioner coating film is formed from a composition containing a cationic (meth)acrylic polymer emulsion and an inorganic hydraulic substance. The coating film formed on the surface of the base conditioner coating film is a coating film formed from a composition containing an alkyl (meth)acrylate emulsion and an inorganic hydraulic substance, and has an elongation rate of 50 to 2000% at 20°C. It has a salt blocking property of 10 −2 to 10 −4 mg/cm 2 ·day, a water vapor permeability of 5 g/m 2 ·day or more, and a film thickness of 100 to 5000 μm.

特開２０１０－１４４３６０号公報Japanese Patent Application Publication No. 2010-144360 特開２０００－１６８８６号公報Japanese Patent Application Publication No. 2000-16886

特許文献１等の従来のコンクリート補修シートは、基材と他の層（例えば接着剤層や補強部材）との接着力の違い、基材、接着剤層及び補強部材等の伸びの違い、接着剤層とコンクリートとの接着強度の問題等、解決すべき課題がある。具体的には、基材と補強部材とは接着剤層で貼り合わされているが、コンクリート補修シートの施工時や施工後のコンクリート補修シートに圧力が加わった場合、基材、接着剤層及び補強部材等の伸びの違いは、基材と接着剤層との接着力と接着剤層と補強部材との接着力との相違に基づいた層界面の剥離の原因になり得る。 Conventional concrete repair sheets such as those disclosed in Patent Document 1 have problems such as differences in adhesive strength between the base material and other layers (for example, adhesive layer and reinforcing member), differences in elongation of the base material, adhesive layer, reinforcing member, etc., and adhesion. There are issues that need to be resolved, such as the issue of adhesive strength between the agent layer and concrete. Specifically, the base material and reinforcing member are bonded together with an adhesive layer, but if pressure is applied to the concrete repair sheet during or after construction of the concrete repair sheet, the base material, adhesive layer, and reinforcement Differences in the elongation of members etc. may cause peeling at the layer interface based on the difference in adhesive force between the base material and the adhesive layer and between the adhesive layer and the reinforcing member.

また、コンクリート補修シートに設けられた接着剤層は加熱等で軟化されてコンクリートに貼り合わされるが、十分な接着強度が得られない場合は、コンクリートの表面からコンクリート補修シートが剥がれて補修シートとして機能しないおそれがある。また、コンクリート補修シートを施工した後のコンクリートは、時が経つと膨れる現象が生じることがあったが、この現象は、コンクリート内部の水蒸気が水蒸気透過性の低い補修シートの存在によって逃げ場を失ったためであると考えられる。 In addition, the adhesive layer provided on the concrete repair sheet is softened by heating etc. and is bonded to the concrete, but if sufficient adhesive strength is not obtained, the concrete repair sheet will peel off from the surface of the concrete and become a repair sheet. There is a risk that it may not function. In addition, after applying the concrete repair sheet, the concrete sometimes swells over time, but this phenomenon occurs because the water vapor inside the concrete has no place to escape due to the presence of the repair sheet, which has low water vapor permeability. It is thought that.

また、現場で塗工によって塗膜を形成する方法は、上記背景技術の欄で説明したように、１層塗工する毎に１日かかり、下塗り層から上塗り層まで例えば６層の塗工膜を形成する場合には６日もかかり、しかも膜厚がばらつき、表面粗さや含水量等の品質や特性も安定しにくいという課題がある。 In addition, as explained in the background art section above, the method of forming a coating film on-site by coating takes one day for each layer, and the coating film is made of, for example, six layers from the undercoat layer to the topcoat layer. It takes as long as six days to form a film, and there are problems in that the film thickness varies and the quality and properties such as surface roughness and water content are difficult to stabilize.

本発明は、上記課題を解決するためになされたものであり、その目的は、コンクリート等の構造物やプレキャスト部材の表面に保護層を設ける際の工期を大幅に削減できるとともに、構造物を長期にわたって保護することができる構造物保護シート、その構造物保護シートを用いた施工方法及びプレキャスト部材、並びに、プレキャスト部材の製造方法を提供することにある。 The present invention has been made to solve the above problems, and its purpose is to significantly reduce the construction period when providing a protective layer on the surface of structures such as concrete or precast members, and to extend the lifespan of structures over a long period of time. An object of the present invention is to provide a structure protection sheet that can be protected over a long period of time, a construction method using the structure protection sheet, a precast member, and a method for manufacturing the precast member.

なお、プレキャスト部材は、現場で組み立て設置を行うために、工場等で予め製造されたコンクリート製品のことである。プレキャスト部材は、現場まで輸送車両で搬送されるが、特に大型のプレキャスト部材は大型トレーラーで搬送され、現場で次々に設置され、道路橋、トンネル、下水道管きょ等の大型構造物が構成される。 Note that a precast member is a concrete product manufactured in advance at a factory or the like in order to be assembled and installed on site. Precast members are transported to the site by transport vehicles, and particularly large precast members are transported by large trailers and installed one after another at the site to construct large structures such as road bridges, tunnels, and sewer pipes. Ru.

本発明者は、コンクリートの表面に塗工手段で層を形成する施工方法によらないで、コンクリートを長期間安定して保護できるコンクリート保護シートを研究した。その結果、コンクリート保護シートに、コンクリートの特性に応じた性能を付与すること、具体的には、コンクリートに生じたひび割れや膨張に追従できる追従性、コンクリート内に水や塩化物イオン等の劣化因子を浸透させない防水性、遮塩性、中性化阻止性、及び、コンクリート中の水分を水蒸気として排出できる水蒸気透過性、等をさらに備えることを実現し、本発明を完成させた。そして、この技術思想は、コンクリート用でない他の構造物に対しても構造物保護シートとして応用可能である。 The present inventor has researched a concrete protection sheet that can stably protect concrete for a long period of time without using a construction method of forming a layer on the surface of concrete using a coating method. As a result, we are able to provide concrete protection sheets with performance that matches the characteristics of concrete, specifically, the ability to follow cracks and expansion that occur in concrete, and the ability to follow deterioration factors such as water and chloride ions in concrete. The present invention has been completed by realizing further properties such as waterproofing, salt blocking, and neutralization preventing properties, and water vapor permeability that allows moisture in the concrete to be discharged as water vapor. This technical idea can also be applied as a structure protection sheet to other structures other than concrete.

（１）本発明に係る構造物保護シートは、構造物側に設けられたポリマーセメント層と、該ポリマーセメント層上に設けられた樹脂層とを備え、厚さ分布が±１００μｍ以内である、ことを特徴とする。 (1) The structure protection sheet according to the present invention includes a polymer cement layer provided on the structure side and a resin layer provided on the polymer cement layer, and has a thickness distribution within ±100 μm. It is characterized by

この発明によれば、厚さ分布が上記範囲内にあるので、熟練した作業者でなくても厚さバラツキの小さい層を構造物の表面に安定して設けることができる。構造物側に設けられるポリマーセメント層は、構造物との密着性等に優れ、ポリマーセメント層上に設けられる樹脂層は、防水性、遮塩性、中性化阻止性、等に優れている。また、基材、接着剤層及び補強部材等の構成要素を有さないので、各構成要素間の接着力の違いや各構成要素の伸びの違いに基づいた上記従来の問題が生じにくい。また、接着剤層とコンクリート等の構造物との接着強度の問題も生じにくい。また、構造物保護シートは工場の生産ラインでの塗工工程と乾燥工程により、厚さ分布のバラツキを小さくして量産できるので、低コスト化、現場での作業工期の大幅削減、構造物の長期保護を実現することができる。 According to this invention, since the thickness distribution is within the above range, a layer with small thickness variations can be stably provided on the surface of the structure even by an unskilled worker. The polymer cement layer provided on the structure side has excellent adhesion to the structure, etc., and the resin layer provided on the polymer cement layer has excellent waterproof properties, salt blocking properties, neutralization prevention properties, etc. . Moreover, since it does not have constituent elements such as a base material, an adhesive layer, and a reinforcing member, the above-mentioned conventional problems based on differences in adhesive strength between each constituent element and differences in elongation of each constituent element are unlikely to occur. Furthermore, problems with adhesive strength between the adhesive layer and a structure such as concrete are less likely to occur. In addition, structure protection sheets can be mass-produced with less variation in thickness distribution through the coating and drying processes on factory production lines, resulting in lower costs, a significant reduction in on-site work time, and Long-term protection can be achieved.

本発明に係る構造物保護シートにおいて、前記ポリマーセメント層と前記樹脂層の両層が、それぞれ、単層で形成されているか又は積層として形成されてもよい。 In the structure protection sheet according to the present invention, both the polymer cement layer and the resin layer may each be formed as a single layer or as a laminate.

この発明によれば、全体厚さ、付与機能（追従性、防水性、遮塩性、中性化阻止性、接着性、水蒸気透過性等）、生産コスト等を考慮して、それぞれの層を単層とするか積層とするかを任意に選択することができる。 According to this invention, each layer is designed in consideration of the overall thickness, functions provided (conformability, waterproofness, salt blocking properties, neutralization prevention properties, adhesive properties, water vapor permeability, etc.), production costs, etc. A single layer or a laminated layer can be arbitrarily selected.

本発明に係る構造物保護シートにおいて、前記ポリマーセメント層は、セメント成分を含有する樹脂で形成された層である。なお、本発明において『ポリマーセメント』の語は、その組成の中の樹脂成分含有割合に依らず、用いられるものとする。 In the structure protection sheet according to the present invention, the polymer cement layer is a layer formed of a resin containing a cement component. In the present invention, the term "polymer cement" is used regardless of the content ratio of the resin component in its composition.

この発明によれば、ポリマーセメント層は追従性に優れた相溶性のよい層であるので、層自体の密着性は優れている。さらに、構造物側のポリマーセメント層が含有するセメント成分はコンクリート等の構造物との密着性を高めるように作用する。 According to this invention, since the polymer cement layer is a layer with excellent followability and good compatibility, the layer itself has excellent adhesion. Furthermore, the cement component contained in the polymer cement layer on the structure side acts to improve adhesion to structures such as concrete.

本発明に係る構造物保護シートにおいて、前記ポリマーセメント層と前記樹脂層との一方の面に離型シートを備えていてもよい。 In the structure protection sheet according to the present invention, a release sheet may be provided on one side of the polymer cement layer and the resin layer.

この発明によれば、離型シートを備えていてもよく、例えば施工現場への輸送の際に構造物保護シートの表面を保護することができ、施工現場では離型シートを剥がして貼り合わせることができる。なお、離型シートは、構造物保護シートの生産工程で利用する工程紙あることが好ましい。 According to this invention, a release sheet may be provided, and for example, the surface of the structure protection sheet can be protected during transportation to a construction site, and the release sheet can be peeled off and pasted at the construction site. I can do it. Note that the release sheet is preferably a process paper used in the production process of the structure protection sheet.

本発明に係る構造物保護シートにおいて、水蒸気透過率が１０～５０ｇ／ｍ２・ｄａｙの防水シートである。 The structure protection sheet according to the present invention is a waterproof sheet with a water vapor permeability of 10 to 50 g/m 2 ·day.

この発明によれば、上記範囲内の水蒸気透過率を有する防水シートであるので、外からコンクリート等の構造物に水分や劣化因子が入るのを防ぐことができるとともに、構造物内の水分を水蒸気として外に透過することができる。 According to the present invention, since the waterproof sheet has a water vapor permeability within the above range, it is possible to prevent moisture and deterioration factors from entering structures such as concrete from the outside, and to remove water vapor from the moisture inside the structure. can be transmitted to the outside as

（２）本発明に係る構造物保護シートの施工方法は、上記本発明に係る構造物保護シートを使用した施工方法であって、構造物上に接着剤を塗布した後に前記構造物保護シートを貼り合わせる、ことを特徴とする。 (2) A construction method for a structure protection sheet according to the present invention is a construction method using the structure protection sheet according to the present invention, in which the structure protection sheet is applied after applying an adhesive on a structure. It is characterized by pasting together.

この発明によれば、基材や補強部材を含まない層だけで構成された厚さバラツキの小さい構造物保護シートを使用するので、構造物の表面に容易に貼り合わせることができる。その結果、熟練した作業者でなくても厚さバラツキの小さい層を構造物の表面に安定して設けることができ、工期を大幅に削減できるとともに、構造物を長期にわたって保護することができる。 According to this invention, since a structure protection sheet is used that is composed of only layers that do not include a base material or a reinforcing member and has a small variation in thickness, it can be easily attached to the surface of a structure. As a result, a layer with small thickness variations can be stably provided on the surface of a structure even by an unskilled worker, the construction period can be significantly reduced, and the structure can be protected for a long period of time.

本発明に係る構造物保護シートの施工方法において、前記構造物と前記接着剤との間に下塗り層を設ける。 In the method for constructing a structure protection sheet according to the present invention, an undercoat layer is provided between the structure and the adhesive.

この発明によれば、構造物と接着剤との間に設ける下塗り層は、相互の密着を高めるように作用するので、構造物保護シートは、長期間安定して構造物を保護することができる。 According to this invention, the undercoat layer provided between the structure and the adhesive acts to enhance mutual adhesion, so the structure protection sheet can stably protect the structure for a long period of time. .

（３）本発明に係るプレキャスト部材は、本発明に係る構造物保護シートがコンクリートの表面の一部又は全部に接着剤を介することなく設けられている、ことを特徴とする。 (3) The precast member according to the present invention is characterized in that the structure protection sheet according to the present invention is provided on a part or all of the surface of concrete without using an adhesive.

この発明によれば、熟練した作業者でなくても厚さバラツキが小さい保護シートがコンクリートの表面に接着剤を介することなく設けられているので、長期間不具合なく使用されるプレキャスト部材の低コスト化を実現できる。 According to this invention, a protective sheet with small thickness variations can be applied to the concrete surface without the need for an adhesive, even by unskilled workers, resulting in low-cost precast members that can be used for a long period of time without any problems. can be realized.

（４）本発明に係るプレキャスト部材の製造方法は、構造物保護シートを型枠内面に配置した後に該型枠内にコンクリート形成用組成物を流し込んでプレキャスト部材を製造する方法であって、製造された前記プレキャスト部材は、前記構造物保護シートがその表面の一部又は全部に設けられ、前記構造物保護シートが、ポリマーセメント層と該ポリマーセメント層上に設けられる樹脂層とを備えた厚さ分布が±１００μｍ以内である、ことを特徴とする。 (4) The method for manufacturing a precast member according to the present invention is a method for manufacturing a precast member by placing a structure protection sheet on the inner surface of a mold and then pouring a concrete forming composition into the mold. The precast member is provided with the structure protection sheet on a part or all of its surface, and the structure protection sheet has a thickness including a polymer cement layer and a resin layer provided on the polymer cement layer. It is characterized in that the distribution is within ±100 μm.

この発明によれば、構造物保護シートで覆われたプレキャスト部材を容易に製造することができる。特に、プレキャスト部材を製造した後に構造物保護シートを貼り合わせる従来の方法とは異なり、コンクリートと構造物保護シートとの間に下塗り層や接着剤層を設けないので、コンクリートとポリマーセメント層との強固な密着性を実現することができる。 According to this invention, a precast member covered with a structure protection sheet can be easily manufactured. In particular, unlike the conventional method of laminating a structural protection sheet after manufacturing precast members, no undercoat layer or adhesive layer is provided between the concrete and the structural protection sheet, so the bond between the concrete and polymer cement layer is Strong adhesion can be achieved.

本発明によれば、コンクリート等の構造物を長期にわたって保護することができる構造物保護シート、その構造物保護シートを用いた施工方法及びプレキャスト部材、並びに、プレキャスト部材の製造方法を提供することができる。特に、構造物保護シートに構造物の特性に応じた性能を付与し、構造物に生じたひび割れや膨張に追従させること、構造物に水や塩化物イオン等の劣化因子を浸透させないようにすること、構造物中の水分や劣化因子を排出できる透過性を持たせること等を実現した構造物保護シートを提供することができる。さらに、これまで手塗りで形成されてきた層と比較して品質の安定性、均一性を改善できる利点を有する。 According to the present invention, it is possible to provide a structure protection sheet that can protect structures such as concrete for a long period of time, a construction method using the structure protection sheet, a precast member, and a method for manufacturing the precast member. can. In particular, the structure protection sheet should be given performance according to the characteristics of the structure, so that it can follow the cracks and expansion that occur in the structure, and it should prevent deterioration factors such as water and chloride ions from penetrating into the structure. In addition, it is possible to provide a structure protection sheet that has permeability that allows moisture and deterioration factors in the structure to be discharged. Furthermore, it has the advantage of improving quality stability and uniformity compared to layers that have been formed by hand coating.

本発明に係る構造物保護シートの一例を示す断面構成図である。FIG. 1 is a cross-sectional configuration diagram showing an example of a structure protection sheet according to the present invention. 本発明に係る構造物保護シートの他の一例を示す断面構成図である。FIG. 2 is a cross-sectional configuration diagram showing another example of a structure protection sheet according to the present invention. 構造物保護シートの施工方法の説明図である。It is an explanatory view of the construction method of a structure protection sheet. 現場打ち工法に構造物保護シートを適用した例を示す説明図である。FIG. 2 is an explanatory diagram showing an example in which a structure protection sheet is applied to the cast-in-place construction method. 本発明に係るプレキャスト部材の例を示す説明図である。It is an explanatory view showing an example of a precast member concerning the present invention. プレキャスト部材を製造するための型枠の説明図である。It is an explanatory view of a formwork for manufacturing a precast member. プレキャスト部材の製造方法の一例を示す説明図である。It is an explanatory view showing an example of the manufacturing method of a precast member.

以下、本発明に係る構造物保護シート、それを用いた施工方法及びプレキャスト部材、並びに、プレキャスト部材の製造方法について図面を参照しつつ説明する。なお、本発明は、その技術的特徴を有する限り各種の変形が可能であり、以下の説明及び図面の形態に限定されない。 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a structure protection sheet, a construction method using the same, a precast member, and a method for manufacturing a precast member according to the present invention will be described with reference to the drawings. Note that the present invention can be modified in various ways as long as it has the technical characteristics thereof, and is not limited to the forms shown in the following description and drawings.

［構造物保護シート］
本発明に係る構造物保護シート１は、図１～図３に示すように、構造物２１側に設けられたポリマーセメント層２と、ポリマーセメント層２上に設けられた樹脂層３とを備え、厚さ分布が±１００μｍ以内、好ましくは±５０μｍ以内であることに特徴がある。このポリマーセメント層２と樹脂層３の両層が、それぞれ、単層で形成されてもよいし積層として形成されてもよい。 [Structure protection sheet]
As shown in FIGS. 1 to 3, the structure protection sheet 1 according to the present invention includes a polymer cement layer 2 provided on the structure 21 side and a resin layer 3 provided on the polymer cement layer 2. , the thickness distribution is within ±100 μm, preferably within ±50 μm. Both the polymer cement layer 2 and the resin layer 3 may each be formed as a single layer or as a laminate.

この構造物保護シート１は、厚さ分布が上記範囲内であるので、熟練した作業者でなくても厚さバラツキの小さい層を構造物２１の表面に安定して設けることができる。構造物側に設けられたポリマーセメント層２は、構造物２１との密着性等に優れ、ポリマーセメント層２上に設けられた樹脂層３は、防水性、遮塩性、中性化阻止性等に優れている。また、基材、接着剤層及び補強部材等の構成要素を有さないので、各構成要素間の接着力の違いや各構成要素の伸びの違いに基づいた問題が生じにくい。また、接着剤層とコンクリート等の構造物との接着強度の問題も生じにくい。また、構造物保護シート１は工場の生産ラインでの塗工工程と乾燥工程により、厚さ分布のバラツキを小さくして量産できるので、低コスト化、現場での作業工期の大幅削減、構造物の長期保護を実現することができる。その結果、構造物２１の表面に貼り合わせる際の工期を大幅に削減できるとともに構造物２１を長期にわたって保護することができる。 Since this structure protection sheet 1 has a thickness distribution within the above range, even an unskilled worker can stably provide a layer with small thickness variations on the surface of the structure 21. The polymer cement layer 2 provided on the structure side has excellent adhesion to the structure 21, etc., and the resin layer 3 provided on the polymer cement layer 2 has waterproof properties, salt blocking properties, and neutralization prevention properties. Excellent in etc. Further, since it does not have constituent elements such as a base material, an adhesive layer, and a reinforcing member, problems due to differences in adhesive strength between each constituent element or differences in elongation of each constituent element are less likely to occur. Furthermore, problems with adhesive strength between the adhesive layer and a structure such as concrete are less likely to occur. In addition, the structure protection sheet 1 can be mass-produced with less variation in thickness distribution through the coating and drying processes on the factory production line, resulting in lower costs, a significant reduction in on-site work period, and long-term protection can be achieved. As a result, the construction period for bonding to the surface of the structure 21 can be significantly reduced, and the structure 21 can be protected for a long period of time.

以下、各構成要素の具体例について詳しく説明する。 Specific examples of each component will be described in detail below.

（構造物）
構造物２１は、本発明に係る構造物保護シート１が適用される相手部材である。構造物２１としては、コンクリートからなる構造物を挙げることができる。コンクリートは、一般的には、セメント系無機物質と骨材と混和剤と水とを少なくとも含有するセメント組成物を打設し、養生して得られる。こうしたコンクリートは、道路橋、トンネル、水門等河川管理施設、下水道管きょ、港湾岸壁等の土木構造物として広く使用される。本発明ではコンクリートからなる構造物２１に構造物保護シート１を適用することで、コンクリートに生じたひび割れや膨張に追従でき、コンクリート内に水や塩化物イオン等の劣化因子を浸透させず、コンクリート中の水分を水蒸気として排出できる、という格別の利点がある。 (Structure)
The structure 21 is a counterpart member to which the structure protection sheet 1 according to the present invention is applied. As the structure 21, a structure made of concrete can be mentioned. Concrete is generally obtained by pouring and curing a cement composition containing at least a cementitious inorganic substance, aggregate, an admixture, and water. Such concrete is widely used in civil engineering structures such as road bridges, tunnels, river management facilities such as water gates, sewer pipes, and harbor quay walls. In the present invention, by applying the structure protection sheet 1 to the structure 21 made of concrete, it is possible to follow the cracks and expansion that occur in the concrete, and prevent deterioration factors such as water and chloride ions from penetrating into the concrete. It has the special advantage of being able to release the moisture inside as steam.

（ポリマーセメント層）
ポリマーセメント層２は、図３（Ｃ）に示すように、構造物側に配置される層である。このポリマーセメント層２は、例えば、図１（Ａ）に示すように重ね塗りしない単層であってもよいし、図１（Ｂ）に示すように重ね塗りした積層であってもよい。単層とするか積層とするかは、全体厚さ、付与機能（追従性、構造物への接着性等）、工場の製造ライン、生産コスト等を考慮して任意に設定され、例えば製造ラインが短くて単層では所定の厚さにならない場合は、２層以上重ね塗りして形成することができる。なお、例えば２層の重ね塗りは、１層目の層を乾燥した後に２層目の層を形成する。 (polymer cement layer)
The polymer cement layer 2 is a layer placed on the structure side, as shown in FIG. 3(C). This polymer cement layer 2 may be, for example, a single layer without overlapping coatings as shown in FIG. 1(A), or may be a laminated layer with overlapping coatings as shown in FIG. 1(B). Whether to use a single layer or a laminated layer is determined arbitrarily by taking into consideration the overall thickness, added functions (followability, adhesion to structures, etc.), factory production line, production cost, etc. For example, the production line If it is too short to achieve the desired thickness with a single layer, it can be formed by overcoating two or more layers. In addition, for example, in overcoating of two layers, the second layer is formed after drying the first layer.

ポリマーセメント層２は、セメント成分を含有する樹脂（樹脂成分）を塗料状にした、この塗料を塗工して得られる。セメント成分としては、各種のセメント、酸化カルシウムからなる成分を含む石灰石類、二酸化ケイ素を含む粘度類等を挙げることができる。なかでもセメントが好ましく、例えば、ポルトランドセメント、アルミナセメント、早強セメント、フライアッシュセメント等を挙げることができる。いずれのセメントを選択するかは、ポリマーセメント層２が備えるべき特性に応じて選択され、例えば、コンクリート構造物２１構造物への追従性の程度を考慮して選択される。特に、ＪＩＳ Ｒ５２１０に規定されるポルトランドセメントを好ましく挙げることができる。 The polymer cement layer 2 is obtained by coating a resin containing a cement component (resin component) in the form of a paint. Examples of the cement component include various cements, limestones containing a component consisting of calcium oxide, clays containing silicon dioxide, and the like. Among them, cement is preferred, and examples thereof include Portland cement, alumina cement, early strength cement, and fly ash cement. Which cement is selected is selected depending on the characteristics that the polymer cement layer 2 should have, and for example, is selected in consideration of the degree of conformability to the concrete structure 21 structure. Particularly preferred is Portland cement defined in JIS R5210.

樹脂成分としては、アクリル樹脂、アクリルウレタン樹脂、アクリルシリコーン樹脂、フッ素樹脂、柔軟エポキシ樹脂系、ポリブタジエンゴム系等を挙げることができる。こうした樹脂成分は、後述の樹脂層３を構成する樹脂成分と同じものであることが、ポリマーセメント層２と樹脂層３との密着性を高める観点から好ましい。 Examples of the resin component include acrylic resin, acrylic urethane resin, acrylic silicone resin, fluororesin, flexible epoxy resin, polybutadiene rubber, and the like. It is preferable that such a resin component be the same as the resin component constituting the resin layer 3 described later from the viewpoint of improving the adhesiveness between the polymer cement layer 2 and the resin layer 3.

ポリマーセメント層２を形成するための塗料は、セメント成分と樹脂成分とを溶媒で混合した塗工液である。樹脂成分については、エマルジョンであることが好ましい。例えば、アクリル系エマルションは、アクリル酸エステル等のモノマーを乳化剤を使用して乳化重合したポリマー微粒子であり、一例としては、アクリル酸エステル及びメタアクリル酸エステルの一種以上を含有する単量体又は単量体混合物を、界面活性剤を配合した水中で重合してなるアクリル酸系重合物エマルジョンを好ましく挙げることができる。アクリル系エマルションを構成するアクリル酸エステル等の含有量は特に限定されないが、２０～１００質量％の範囲内から選択される。また、界面活性剤も必要に応じた量が配合され特に限定されないが、エマルジョンとなる程度の界面活性剤が配合される。 The paint for forming the polymer cement layer 2 is a coating liquid in which a cement component and a resin component are mixed with a solvent. The resin component is preferably an emulsion. For example, an acrylic emulsion is a polymer fine particle obtained by emulsion polymerizing a monomer such as an acrylic ester using an emulsifier. A preferred example is an acrylic acid polymer emulsion obtained by polymerizing a polymer mixture in water containing a surfactant. The content of acrylic esters and the like constituting the acrylic emulsion is not particularly limited, but is selected from within the range of 20 to 100% by mass. Further, a surfactant is also blended in an amount as required, and is not particularly limited, but the surfactant is blended in an amount to form an emulsion.

ポリマーセメント層２は、その塗工液を離型シート４上に塗布し、その後に溶媒（水）を乾燥除去することで形成される。例えば、セメント成分とアクリル系エマルジョンとの混合組成物を塗工液として使用し、ポリマーセメント層２を形成する。なお、図２（Ａ）に示すように、離型シート４上には、ポリマーセメント層２を形成した後に樹脂層３を形成してもよいが、図２（Ｂ）に示すように、離型シート４上に樹脂層３を形成した後にポリマーセメント層２を形成してもよい。 The polymer cement layer 2 is formed by applying the coating liquid onto the release sheet 4 and then drying and removing the solvent (water). For example, the polymer cement layer 2 is formed using a mixed composition of a cement component and an acrylic emulsion as a coating liquid. Note that, as shown in FIG. 2(A), the resin layer 3 may be formed on the release sheet 4 after forming the polymer cement layer 2, but as shown in FIG. 2(B), the resin layer 3 may be formed on the release sheet 4. The polymer cement layer 2 may be formed after the resin layer 3 is formed on the mold sheet 4.

ポリマーセメント層２の厚さは特に限定されないが、構造物２１の使用形態（道路橋、トンネル、水門等河川管理施設、下水道管きょ、港湾岸壁等の土木構造物等）、経年度合い、形状等によって任意に設定される。厚さとしては、例えば、０．５ｍｍ～１．５ｍｍの範囲とすることができる。一例として１ｍｍの厚さとした場合は、その厚さバラツキは、±１００μｍ以内となる。こうした精度の厚さは、現場での塗工ではとうてい実現できないものであり、工場の製造ラインで安定して塗工されることにより実現することができる。なお、１ｍｍよりも薄い場合は、厚さバラツキをさらに小さくすることができる。 The thickness of the polymer cement layer 2 is not particularly limited, but it depends on the type of use of the structure 21 (road bridges, tunnels, river management facilities such as water gates, civil engineering structures such as sewer pipes, port quays, etc.), age, and shape. It is set arbitrarily by etc. The thickness can be, for example, in the range of 0.5 mm to 1.5 mm. As an example, when the thickness is 1 mm, the thickness variation is within ±100 μm. Such precise thickness cannot be achieved by coating on-site, but can be achieved by stable coating on a factory production line. Note that when the thickness is thinner than 1 mm, the thickness variation can be further reduced.

このポリマーセメント層２は、セメント成分の存在により、後述の樹脂層３に比べて水蒸気が容易に透過する。このときの水蒸気透過率は、例えば１０～５０ｇ／ｍ２・ｄａｙ程度である。さらに、セメント成分は、例えばコンクリートを構成するセメント成分との相溶性がよく、コンクリート表面との密着性に優れたものとすることができる。また、図３に示すように、構造物２１の表面に下塗り層２２と接着剤２３が順に設けられている場合にも、セメント成分を含有するポリマーセメント層２が接着剤２３に密着性よく接着する。また、このポリマーセメント層２は、延伸性があるので、構造物２１にひび割れや膨張が生じた場合であっても、コンクリートの変化に追従することができる。 Water vapor permeates through the polymer cement layer 2 more easily than the resin layer 3 described below due to the presence of cement components. The water vapor permeability at this time is, for example, about 10 to 50 g/m 2 ·day. Furthermore, the cement component has good compatibility with, for example, the cement component constituting concrete, and can have excellent adhesion to the concrete surface. Furthermore, as shown in FIG. 3, even when an undercoat layer 22 and an adhesive 23 are sequentially provided on the surface of the structure 21, the polymer cement layer 2 containing a cement component adheres to the adhesive 23 with good adhesion. do. Further, since the polymer cement layer 2 has extensibility, it can follow changes in concrete even if the structure 21 cracks or expands.

（樹脂層）
樹脂層３は、図３（Ｃ）に示すように、構造物２１とは反対側に配置されて、表面に現れる層である。この樹脂層３は、例えば、図１（Ａ）に示すように単層であってもよいし、図１（Ｂ）に示すように積層であってもよい。単層とするか積層とするかは、全体厚さ、付与機能（防水性、遮塩性、中性化阻止性、水蒸気透過性等）、工場の製造ラインの長さ、生産コスト等を考慮して任意に設定され、例えば製造ラインが短くて単層では所定の厚さにならない場合は、２層以上重ね塗りして形成することができる。なお、重ね塗りは、１層目の層を乾燥した後に２層目の層を塗工する。２層目の層は、その後乾燥される。 (resin layer)
The resin layer 3 is a layer that is placed on the opposite side of the structure 21 and appears on the surface, as shown in FIG. 3(C). This resin layer 3 may be, for example, a single layer as shown in FIG. 1(A), or may be a laminated layer as shown in FIG. 1(B). Whether to use a single layer or a laminated layer takes into consideration the overall thickness, added functions (waterproofing, salt blocking, neutralization prevention, water vapor permeability, etc.), length of the factory production line, production cost, etc. For example, if the production line is short and a single layer cannot achieve the desired thickness, it can be formed by overcoating two or more layers. In the case of overcoating, the second layer is applied after the first layer is dried. The second layer is then dried.

樹脂層３は、柔軟性を有し、コンクリートに発生したひび割れや亀裂に追従できるとともに防水性、遮塩性、中性化阻止性及び水蒸気透過性に優れた樹脂層３を形成できる塗料を塗工して得られる。樹脂層３を構成する樹脂としては、ゴム特性を示すアクリル系樹脂、アクリルウレタン樹脂、アクリルシリコーン樹脂、フッ素樹脂、柔軟エポキシ樹脂、ポリブタジエンゴム等を挙げることができる。この樹脂材料は、前記したポリマーセメント層２を構成する樹脂成分と同じものであること好ましい。特に弾性膜形成成分を含有する樹脂であることが好ましい。 The resin layer 3 is coated with a paint that is flexible and can follow cracks and fissures that occur in the concrete, and can form a resin layer 3 that has excellent waterproofing, salt blocking properties, neutralization prevention properties, and water vapor permeability. It can be obtained by working. Examples of the resin constituting the resin layer 3 include acrylic resins, acrylic urethane resins, acrylic silicone resins, fluororesins, flexible epoxy resins, and polybutadiene rubbers that exhibit rubber properties. This resin material is preferably the same as the resin component constituting the polymer cement layer 2 described above. In particular, a resin containing an elastic film-forming component is preferable.

これらのうち、ゴム特性を示すアクリル系樹脂は、安全性と塗工性に優れている点で、アクリルゴム系共重合体の水性エマルションからなることが好ましい。なお、エマルション中のアクリルゴム系共重合体の割合は例えば３０～７０質量％である。アクリルゴム系共重合体エマルションは、例えば界面活性剤の存在下で単量体を乳化重合することにより得られる。界面活性剤は、アニオン系、ノニオン系、カチオン系のいずれもが使用できる。 Among these, the acrylic resin exhibiting rubber properties is preferably composed of an aqueous emulsion of an acrylic rubber copolymer because of its excellent safety and coating properties. The proportion of the acrylic rubber copolymer in the emulsion is, for example, 30 to 70% by mass. The acrylic rubber copolymer emulsion can be obtained, for example, by emulsion polymerization of monomers in the presence of a surfactant. Any of anionic, nonionic, and cationic surfactants can be used.

樹脂層３を形成するための塗料は、樹脂組成物と溶媒との混合塗工液を作製し、その塗工液を離型シート４上に塗布し、その後に溶媒を乾燥除去することで、樹脂層３を形成する。溶媒は、水又は水系溶媒であってもよいし、キシレン・ミネラルスピリット等の有機系溶媒であってもよい。後述の実施例では、水系溶媒を用いており、アクリル系ゴム組成物で樹脂層３を作製している。なお、離型シート４上には、後述の実施例に示すように、離型シート４上に樹脂層３を形成し、その後にポリマーセメント層２を形成することが好ましい。 The paint for forming the resin layer 3 is prepared by preparing a mixed coating liquid of a resin composition and a solvent, applying the coating liquid onto the release sheet 4, and then drying and removing the solvent. A resin layer 3 is formed. The solvent may be water or an aqueous solvent, or an organic solvent such as xylene or mineral spirit. In the examples described below, an aqueous solvent is used, and the resin layer 3 is made of an acrylic rubber composition. In addition, it is preferable to form the resin layer 3 on the release sheet 4, and then to form the polymer cement layer 2 on the release sheet 4, as shown in Examples below.

樹脂層３の厚さは、構造物２１の使用形態（道路橋、トンネル、水門等河川管理施設、下水道管きょ、港湾岸壁等の土木構造物等）、経年度合い、形状等によって任意に設定される。一例としては、５０～１５０μｍの範囲内のいずれかの厚さとし、その厚さバラツキは、±５０μｍ以内とすることが好ましい。こうした精度の厚さは、現場での塗工ではとうてい実現できないものであり、工場の製造ラインで安定して実現することができる。 The thickness of the resin layer 3 is arbitrarily set depending on the type of use of the structure 21 (road bridges, tunnels, river management facilities such as water gates, civil engineering structures such as sewer pipes, port quays, etc.), age, shape, etc. be done. For example, it is preferable that the thickness be within the range of 50 to 150 μm, and that the thickness variation be within ±50 μm. This kind of precision in thickness is something that cannot be achieved by coating on-site, but can be achieved reliably on a factory production line.

この樹脂層３は、高い防水性、遮塩性、中性化阻止性を有するが、水蒸気は透過する。このときの水蒸気透過率としては、例えば１０～５０ｇ／ｍ２・ｄａｙ程度とすることが望ましい。こうすることにより、構造物保護シート１に高い防水性、遮塩性、中性化阻止性と所定の水蒸気透過性を持たせることができる。さらに、ポリマーセメント層２と同種の樹脂成分で構成されることにより、ポリマーセメント層２との相溶性がよく、密着性に優れたものとすることができる。水蒸気透過性は、ＪＩＳ Ｚ０２０８「防湿包装材料の透湿度試験方法」に準拠して測定した。 This resin layer 3 has high waterproofing properties, salt blocking properties, and neutralization prevention properties, but is permeable to water vapor. At this time, the water vapor permeability is preferably about 10 to 50 g/m 2 ·day, for example. By doing so, the structure protection sheet 1 can be provided with high waterproofing properties, salt blocking properties, neutralization prevention properties, and predetermined water vapor permeability. Furthermore, by being composed of the same type of resin component as the polymer cement layer 2, it is possible to have good compatibility with the polymer cement layer 2 and excellent adhesion. Water vapor permeability was measured in accordance with JIS Z0208 "Moisture permeability test method for moisture-proof packaging materials".

作製された構造物保護シート１は、ポリマーセメント層２と樹脂層３との一方の面に離型シート４を備えてもよい。離型シート４は、例えば施工現場への輸送の際に構造物保護シート１の表面を保護することができ、施工現場では離型シート４を容易に剥がして貼り合わせることができる。なお、離型シート４は、構造物保護シート１の生産工程で利用する工程紙であることが好ましい。 The manufactured structure protection sheet 1 may include a release sheet 4 on one side of the polymer cement layer 2 and the resin layer 3. The release sheet 4 can protect the surface of the structure protection sheet 1 during transportation to a construction site, for example, and the release sheet 4 can be easily peeled off and pasted at the construction site. Note that the release sheet 4 is preferably a process paper used in the production process of the structure protection sheet 1.

離型シート４として使用される工程紙は、製造工程で使用される従来公知のものであれば、その材質等は特に限定されない。例えば、公知の工程紙と同様、ポリプロピレンやポリエチレン等のオレフィン樹脂層を有するラミネート紙等を好ましく挙げることができる。その厚さも特に限定されないが、製造上及び施工、取り扱いを阻害する厚さでなければ例えば５０～５００μｍ程度の任意の厚さとすることができる。 The material of the process paper used as the release sheet 4 is not particularly limited as long as it is a conventionally known paper used in the manufacturing process. For example, similar to known process paper, laminated paper having an olefin resin layer such as polypropylene or polyethylene can be preferably used. The thickness is not particularly limited either, but it can be any thickness, for example, about 50 to 500 μm, as long as it does not interfere with manufacturing, construction, and handling.

以上説明した構造物保護シート１は、コンクリート等の構造物２１を長期にわたって保護することができる。特に、構造物保護シート１に構造物２１の特性に応じた性能を付与し、構造物２１に生じたひび割れや膨張に追従させること、構造物２１に水や塩化物イオン等の劣化因子を浸透させないようにすること、構造物中の水分や劣化因子を排出できる透過性を持たせること、ができる。そして、こうした構造物保護シート１は、工場で製造できるので、特性の安定した高品質のものを量産することができる。その結果、職人の技術に寄らずに施工でき、工期の短縮と労務費の削減を実現できる。 The structure protection sheet 1 described above can protect structures 21 such as concrete for a long period of time. In particular, the structure protection sheet 1 is given performance according to the characteristics of the structure 21 to follow cracks and expansion that occur in the structure 21, and deterioration factors such as water and chloride ions are penetrated into the structure 21. It is possible to make the structure permeable so that moisture and deterioration factors can be discharged from the structure. Since such structure protection sheet 1 can be manufactured in a factory, it is possible to mass-produce high quality sheets with stable characteristics. As a result, construction can be carried out without depending on the skills of craftsmen, shortening the construction period and reducing labor costs.

［構造物保護シートの施工方法］
本発明に係る構造物保護シートの施工方法は、図３に示すように、上記本発明に係る構造物保護シート１を使用した施工方法であって、構造物２１上に接着剤２３を塗布した後に構造物保護シート１を貼り合わせる、ことを特徴とする。この施工方法は、基材や補強部材を含まない層だけで構成された厚さバラツキの小さい構造物保護シート１を使用するので、構造物２１の表面に構造物保護シート１を容易に貼り合わせることができる。その結果、熟練した作業者でなくても厚さバラツキの小さい層で構成された構造物保護シート１を、構造物２１に設けることができ、工期を大幅に削減できるとともに、構造物２１を長期にわたって保護することができる。 [Construction method of structure protection sheet]
As shown in FIG. 3, the construction method of the structure protection sheet according to the present invention is a construction method using the structure protection sheet 1 according to the present invention, in which an adhesive 23 is applied on the structure 21. It is characterized in that the structure protection sheet 1 is attached afterwards. This construction method uses the structure protection sheet 1 with small thickness variations, which is composed of only layers that do not include base materials or reinforcing members, so the structure protection sheet 1 can be easily attached to the surface of the structure 21. be able to. As a result, even non-skilled workers can apply the structure protection sheet 1 composed of layers with small thickness variations to the structure 21, which greatly reduces construction time and allows the structure 21 to last for a long time. can be protected over a period of time.

図３は、構造物保護シート１の施工方法の説明図である。施工は、図３（Ａ）に示すように、構造物２１の表面に下塗り層２２を形成する。下塗り層２２は、エポキシ樹脂等の樹脂と溶媒とを混合した塗工液を、構造物２１に塗工し、その後、塗工液中の溶媒を揮発乾燥させて形成することができる。このときの溶媒も上記同様の水等を挙げることができる。下塗り層２２の厚さは特に限定されないが、例えば１００～１５０μｍの範囲内とすることができる。構造物２１と接着剤２３との間に設ける下塗り層２２は、相互の密着を高めるように作用するので、構造物保護シート１は、長期間安定して構造物２１を保護することができる。なお、構造物２１にひび割れや欠損が生じている場合には、それを補修した後に下塗り層２２を設けることが好ましい。なお、補修は特に限定されないが、通常、セメントモルタルやエポキシ樹脂等が使われる。 FIG. 3 is an explanatory diagram of the construction method of the structure protection sheet 1. In construction, as shown in FIG. 3(A), an undercoat layer 22 is formed on the surface of the structure 21. The undercoat layer 22 can be formed by coating the structure 21 with a coating liquid that is a mixture of a resin such as an epoxy resin and a solvent, and then drying by volatilizing the solvent in the coating liquid. The solvent at this time can also include water and the like as described above. The thickness of the undercoat layer 22 is not particularly limited, but may be within the range of 100 to 150 μm, for example. Since the undercoat layer 22 provided between the structure 21 and the adhesive 23 acts to enhance mutual adhesion, the structure protection sheet 1 can stably protect the structure 21 for a long period of time. Note that if the structure 21 has cracks or defects, it is preferable to provide the undercoat layer 22 after repairing the cracks or defects. Although there are no particular limitations on the repair method, cement mortar, epoxy resin, etc. are usually used.

下塗り層２２を形成した後、図３（Ｂ）に示すように、接着剤２３が塗布される。塗布された接着剤２３は、乾燥させることなく、図３（Ｃ）に示すように、その上に構造物保護シート１を貼り合わせる。接着剤２３としては、ウレタン系接着剤、エポキシ系接着剤等を挙げることができる。なかでも、構造物保護シート１のポリマーセメント層２を構成する樹脂成分と同種の樹脂成分からなる接着剤２３は、ポリマーセメント層２との接着強度が高くなるのでより好ましい。接着剤２３の厚さは特に限定されない。接着剤２３は、通常、コンクリートに刷毛塗り又はスプレー塗り等の手段で塗布した後に時間経過によって自然乾燥させて硬化する。 After forming the undercoat layer 22, an adhesive 23 is applied as shown in FIG. 3(B). The structure protection sheet 1 is pasted onto the applied adhesive 23, as shown in FIG. 3(C), without drying it. Examples of the adhesive 23 include urethane adhesives, epoxy adhesives, and the like. Among these, the adhesive 23 made of the same type of resin component as the resin component constituting the polymer cement layer 2 of the structure protection sheet 1 is more preferable since the adhesive strength with the polymer cement layer 2 is high. The thickness of the adhesive 23 is not particularly limited. The adhesive 23 is usually applied to concrete by brushing, spraying, or the like, and then allowed to air dry over time to harden.

図４は、現場打ち工法に構造物保護シート１を適用した例を示す説明図である。現場打ち工法とは、作業現場で型枠２４を形成し、その型枠２４内にコンクリート組成物２１’を流し込み、放置して硬化させてコンクリート構造物２１得る工法である。この現場打ち工法において、硬化したコンクリート構造物２１を形成した後、その表面に構造物保護シート１を貼り合わせることで、劣化が生じにくい構造物２１とすることができる。貼り合わせに当たっては、コンクリート構造物２１の表面に下塗り層２２を塗工・乾燥し、その上に接着剤２３を塗工した後、構造物保護シート１を貼り合わせる。その後、通常、自然放置して接着剤２３を乾燥硬化して、構造物保護シート１を接着する。 FIG. 4 is an explanatory diagram showing an example in which the structure protection sheet 1 is applied to the cast-in-place construction method. The cast-in-place method is a construction method in which a formwork 24 is formed at a work site, a concrete composition 21' is poured into the formwork 24, and the concrete composition 21' is left to harden to obtain the concrete structure 21. In this cast-in-place construction method, after the hardened concrete structure 21 is formed, the structure protection sheet 1 is attached to the surface thereof, thereby making it possible to make the structure 21 resistant to deterioration. In bonding, an undercoat layer 22 is applied and dried on the surface of the concrete structure 21, an adhesive 23 is applied thereon, and then the structure protection sheet 1 is bonded. Thereafter, the adhesive 23 is usually left to dry and harden to adhere the structure protection sheet 1.

一方、既にひび割れ等が生じた構造物２１に対しては、欠損部分を補修した後に、上記同様の施工方法により構造物保護シート１を貼り合わせる。こうしてコンクリート構造物２１の寿命を延ばすことができる。 On the other hand, for structures 21 that have already developed cracks or the like, after repairing the damaged portions, the structure protection sheet 1 is attached using the same construction method as described above. In this way, the life of the concrete structure 21 can be extended.

［プレキャスト部材］
本発明に係るプレキャスト部材は、本発明に係る構造物保護シート（以下、単に保護シートともいう）が用いられたものである。すなわち、本発明に係るプレキャスト部材３１は、図５に示すように、保護シート１が表面の一部又は全部に接着剤を介することなく設けられているプレキャスト部材３１であって、保護シート１が、ポリマーセメント層２と該ポリマーセメント層２上に設けられる樹脂層３とを備えた厚さ分布が±１００μｍ以内である、ことを特徴とする。保護シート１を構成するポ リマーセメント層２は、セメント成分を有する樹脂を塗工して得られた層であり、樹脂層３は、弾性膜形成成分を有する樹脂を塗工して得られた層である。 [Precast parts]
The precast member according to the present invention uses the structure protection sheet (hereinafter also simply referred to as a protection sheet) according to the present invention. That is, as shown in FIG. 5, the precast member 31 according to the present invention is a precast member 31 in which the protective sheet 1 is provided on a part or all of the surface without using an adhesive. , the thickness distribution of the polymer cement layer 2 and the resin layer 3 provided on the polymer cement layer 2 is within ±100 μm. The polymer cement layer 2 constituting the protective sheet 1 is a layer obtained by coating a resin containing a cement component, and the resin layer 3 is a layer obtained by coating a resin containing an elastic film-forming component. It is a layer.

このプレキャスト部材３１は、熟練した作業者でなくても厚さバラツキが小さい保護シート１がコンクリート２１の表面に接着剤を介することなく設けられているので、長期間不具合なく使用されるプレキャスト部材３１の低コスト化を実現できる。保護シート１を構成する層２、３は、いずれも追従性に優れた相溶性のよい樹脂層３であるので、層自体の密着性は優れている。コンクリート２１側に設けられるポリマーセメント層２は、コンクリート２１との密着性等に優れ、ポリマーセメント層２上に設けられる樹脂層３は、防水性、遮塩性、中性化阻止性等に優れている。また、保護シート１は、基材、接着剤層及び補強部材等の構成要素を有さないので、各構成要素間の接着力の違いや各構成要素の伸びの違いに基づいた上記従来の問題が生じにくい。また、保護シート１は工場の生産ラインでの塗工工程と乾燥工程により、厚さ分布のバラツキを小さくして量産できるので、低コスト化を実現できる。 This precast member 31 can be used without any trouble for a long time because the protective sheet 1 with small thickness variation is provided on the surface of the concrete 21 without using an adhesive, even if the operator is not a skilled worker. It is possible to realize cost reduction. Since the layers 2 and 3 constituting the protective sheet 1 are both resin layers 3 with excellent followability and good compatibility, the layers themselves have excellent adhesion. The polymer cement layer 2 provided on the concrete 21 side has excellent adhesion to the concrete 21, etc., and the resin layer 3 provided on the polymer cement layer 2 has excellent waterproof properties, salt blocking properties, neutralization prevention properties, etc. ing. In addition, since the protective sheet 1 does not have constituent elements such as a base material, an adhesive layer, and a reinforcing member, the above-mentioned conventional problems based on differences in adhesive strength between each constituent element and differences in elongation of each constituent element are also avoided. is less likely to occur. Further, the protective sheet 1 can be mass-produced with less variation in thickness distribution through the coating and drying steps on a factory production line, thereby achieving cost reduction.

以下、各構成要素を詳しく説明する。 Each component will be explained in detail below.

［プレキャスト部材］
プレキャスト部材３１は、図５に示すように、保護シート１が表面の一部又は全部に接着剤を介することなく設けられている。プレキャスト部材３１の製造は、図６及び図７に示すように、保護シート１を型枠２４の内面に配置した後にその型枠内にコンクリート組成物２１’を流し込んで製造される。製造されたプレキャスト部材３１は、保護シート１がその表面の一部又は全部に設けられており、保護シート１は、ポリマーセメント層２と、そのポリマーセメント層２上に設けられる樹脂層３とを備えた厚さ分布が±１００μｍ以内、好ましくは±５０μｍ以内である。 [Precast parts]
As shown in FIG. 5, the precast member 31 is provided with the protective sheet 1 on a part or all of the surface without using an adhesive. The precast member 31 is manufactured by placing the protective sheet 1 on the inner surface of the formwork 24 and then pouring the concrete composition 21' into the formwork, as shown in FIGS. 6 and 7. The manufactured precast member 31 has a protective sheet 1 provided on a part or all of its surface, and the protective sheet 1 has a polymer cement layer 2 and a resin layer 3 provided on the polymer cement layer 2. The thickness distribution provided is within ±100 μm, preferably within ±50 μm.

プレキャスト部材３１は、コンクリート２１で構成される。プレキャスト部材３１は、一般的には、セメント系無機物質と骨材と混和剤と水とを少なくとも含有するセメント組成物を打設し、養生して得られる。こうしたプレキャスト部材３１は、道路橋、トンネル、水門等河川管理施設、下水道管きょ、港湾岸壁等の土木コンクリートとして広く使用される。本発明では、プレキャスト部材３１に保護シート１を適用することで、コンクリート２１に生じたひび割れや膨張に追従でき、コンクリート２１内に水や塩化物イオン等の劣化因子を浸透させず、コンクリート２１中の水分を水蒸気として排出できる、という格別の利点がある。 Precast member 31 is made of concrete 21. The precast member 31 is generally obtained by casting and curing a cement composition containing at least a cementitious inorganic substance, aggregate, an admixture, and water. Such precast members 31 are widely used as civil engineering concrete for road bridges, tunnels, river management facilities such as water gates, sewer pipes, harbor quays, and the like. In the present invention, by applying the protective sheet 1 to the precast member 31, it is possible to follow the cracks and expansion that occur in the concrete 21, and prevent deterioration factors such as water and chloride ions from penetrating into the concrete 21. It has the special advantage of being able to discharge the moisture in the form of water vapor.

この製造方法では、保護シート１で覆われたプレキャスト部材３１を容易に作製することができる。特に、従来の施工方法とは異なり、プレキャスト部材３１と保護シート１との間に接着剤２３を設けなくても、コンクリート２１とポリマーセメント層２との強固な密着性を実現することができる。図６は、プレキャスト部材３１を製造するための型枠２４の説明図であり、図７は、プレキャスト部材３１の製造方法の一例を示す説明図である。 With this manufacturing method, the precast member 31 covered with the protective sheet 1 can be easily manufactured. In particular, unlike conventional construction methods, strong adhesion between concrete 21 and polymer cement layer 2 can be achieved without providing adhesive 23 between precast member 31 and protective sheet 1. FIG. 6 is an explanatory diagram of the formwork 24 for manufacturing the precast member 31, and FIG. 7 is an explanatory diagram showing an example of a method for manufacturing the precast member 31.

型枠２４は、図６に示すように、得られるプレキャスト部材３１の用途、大きさ、形状で構成されている。型枠２４の種類は特に限定されない。通常は木枠が用いられるが、それ以外の材質の型枠であってもよい。型枠２４内には、必要に応じて鉄筋等の補強部材が設けられていてもよい。型枠外には、必要に応じて鋼材等の補強部材で型枠自体を補強してもよい。 As shown in FIG. 6, the formwork 24 is configured according to the purpose, size, and shape of the precast member 31 to be obtained. The type of formwork 24 is not particularly limited. A wooden frame is usually used, but a frame made of other materials may be used. In the formwork 24, reinforcing members such as reinforcing bars may be provided as necessary. Outside the formwork, the formwork itself may be reinforced with a reinforcing member such as steel, if necessary.

型枠２４の内面には、保護シート１が敷設される。型枠２４の内面への保護シート１の敷設は、型枠２４の内面に保護シート１を仮止め等して行うことができる。また、図６（Ｂ）に示すような凹形状の型枠２４の場合は、その後にコンクリート組成物２１’が流し込まれるので、保護シート１を型枠２４の内面に押し当てた状態とするだけでもよい。コンクリート組成物２１’は、硬化前のコンクリート流動物であり、型枠内に容易に流し込むことができる。コンクリート組成物２１’は、必要に応じて種々の特性（補強材等）を付与する材料を含んでいてもよい。 A protective sheet 1 is laid on the inner surface of the formwork 24. The protective sheet 1 can be laid on the inner surface of the formwork 24 by temporarily fixing the protective sheet 1 on the inner surface of the formwork 24. In addition, in the case of a concave formwork 24 as shown in FIG. 6(B), since the concrete composition 21' is poured afterwards, the protective sheet 1 is simply pressed against the inner surface of the formwork 24. But that's fine. The concrete composition 21' is a concrete fluid before hardening and can be easily poured into a formwork. The concrete composition 21' may contain materials that impart various properties (such as reinforcement) as required.

流し込んだコンクリート組成物２１’は、通常は自然乾燥して硬化する。硬化したコンクリート２１は、図３に示すように、その表面の一部又は全部がコンクリート２１で覆われたプレキャスト部材３１となる。こうしたプレキャスト部材３１は、保護シート１により長期にわたって保護され、ひび割れや膨張が生じない。さらに、コンクリート２１に水や塩化物イオン等の劣化因子を浸透させない。また、コンクリート２１中の水分が水蒸気として排出されるので、膨張することもない。こうしたプレキャスト部材３１は、工場等で作製きるので、特性の安定した高品質のものを量産することができる。その結果、職人の技術に寄らずに施工でき、工期の短縮と労務費の削減を実現できる。 The poured concrete composition 21' usually dries naturally and hardens. As shown in FIG. 3, the hardened concrete 21 becomes a precast member 31 whose surface is partially or entirely covered with the concrete 21. Such a precast member 31 is protected by the protective sheet 1 for a long period of time, and does not crack or expand. Furthermore, deterioration factors such as water and chloride ions are not allowed to penetrate into the concrete 21. Moreover, since the moisture in the concrete 21 is discharged as water vapor, it does not expand. Since such a precast member 31 can be manufactured in a factory or the like, it is possible to mass-produce high quality products with stable characteristics. As a result, construction can be carried out without depending on the skills of craftsmen, shortening the construction period and reducing labor costs.

（保護シート）
保護シート１は、上述した本発明に係る構造物保護シートと同様である。
こうした保護シート１は、プレキャスト部材３１を長期にわたって保護することができる。特に、保護シート１にプレキャスト部材３１の特性に応じた性能を付与し、コンクリート２１に生じたひび割れや膨張に追従させること、コンクリート２１に水や塩化物イオン等の劣化因子を浸透させないようにすること、コンクリート中の水分や劣化因子を排出できる透過性を持たせることができる。 (protective sheet)
The protective sheet 1 is similar to the structure protective sheet according to the present invention described above.
Such a protective sheet 1 can protect the precast member 31 for a long period of time. In particular, the protection sheet 1 is given performance according to the characteristics of the precast member 31 to follow cracks and expansion that occur in the concrete 21, and to prevent deterioration factors such as water and chloride ions from penetrating into the concrete 21. In addition, it can be made permeable so that moisture and deterioration factors in concrete can be discharged.

以上説明したように、この製造方法によれば、プレキャスト部材３１の表面に保護層を設ける際の工期を大幅に削減できるとともに、長期にわたってプレキャスト部材３１を保護することができる。特に、熟練した作業者でなくても厚さバラツキが小さい保護シート１がコンクリート２１の表面に接着剤を介することなく設けられているので、長期間不具合なく使用されるプレキャスト部材３１の低コスト化を実現できる。 As explained above, according to this manufacturing method, the construction period for providing a protective layer on the surface of the precast member 31 can be significantly reduced, and the precast member 31 can be protected for a long period of time. In particular, since the protective sheet 1, which has small thickness variations even by unskilled workers, is provided on the surface of the concrete 21 without using an adhesive, the precast member 31 can be used for a long period of time without any problems at a low cost. can be realized.

実施例と比較例により本発明をさらに具体的に説明する。 The present invention will be explained in more detail with reference to Examples and Comparative Examples.

［実施例１］
ＰＰラミネート紙からなる厚さ１３０μｍの離型シート４を用いた。その離型シート４上に、ポリマーセメント層形成用組成物を塗工し乾燥して単層からなる厚さ１．２９ｍｍのポリマーセメント層２を形成した。その後、そのポリマーセメント層２上に、アクリル系樹脂を含む樹脂層形成用組成物を塗工し乾燥して単層からなる厚さ１００μｍの樹脂層３を形成した。こうして合計厚さ１．３９ｍｍの構造物保護シート１を作製した。なお、この構造物保護シート１は、約２５℃に管理された工場内で連続生産され、離型シート４を含んだ態様でロール状に巻き取った。 [Example 1]
A release sheet 4 made of PP laminated paper and having a thickness of 130 μm was used. A composition for forming a polymer cement layer was applied onto the release sheet 4 and dried to form a single layer polymer cement layer 2 having a thickness of 1.29 mm. Thereafter, a resin layer forming composition containing an acrylic resin was applied onto the polymer cement layer 2 and dried to form a single layer resin layer 3 having a thickness of 100 μm. In this way, a structure protection sheet 1 having a total thickness of 1.39 mm was produced. The structure protection sheet 1 was continuously produced in a factory controlled at about 25° C., and was wound into a roll including the release sheet 4.

ポリマーセメント層形成用組成物は、セメント混合物を４５質量部含む水系のアクリルエマルジョンである。セメント混合物は、ポルトランドセメント７０±５質量部、二酸化ケイ素１０±５質量部、酸化アルミニウム２±１質量部、酸化チタン１～２質量部を少なくとも含むものであり、アクリルエマルジョンは、アクリル酸エステルモノマーを乳化剤を使用して乳化重合したアクリル酸系重合物５３±２質量部、水４３±２質量部を少なくとも含むものである。これらを混合したポリマーセメント層形成用組成物を塗布乾燥して得られたポリマーセメント層２は、ポルトランドセメントをアクリル樹脂中に５０質量％含有する複合層である。一方、樹脂層形成用組成物は、アクリルシリコーン系樹脂である。このアクリルシリコーン系樹脂は、アクリルシリコーン樹脂６０質量部と、二酸化チタン２５質量部と、酸化第二鉄１０質量部と、カーボンブラック５質量部とを含有するエマルジョン組成物である。 The composition for forming a polymer cement layer is an aqueous acrylic emulsion containing 45 parts by mass of a cement mixture. The cement mixture contains at least 70±5 parts by mass of Portland cement, 10±5 parts by mass of silicon dioxide, 2±1 parts by mass of aluminum oxide, and 1 to 2 parts by mass of titanium oxide, and the acrylic emulsion contains acrylic ester monomer. It contains at least 53±2 parts by mass of an acrylic acid polymer obtained by emulsion polymerization using an emulsifier and 43±2 parts by mass of water. The polymer cement layer 2 obtained by applying and drying a composition for forming a polymer cement layer obtained by mixing these is a composite layer containing 50% by mass of Portland cement in an acrylic resin. On the other hand, the resin layer forming composition is an acrylic silicone resin. This acrylic silicone resin is an emulsion composition containing 60 parts by mass of acrylic silicone resin, 25 parts by mass of titanium dioxide, 10 parts by mass of ferric oxide, and 5 parts by mass of carbon black.

［実施例２］
実施例１で用いたポリマーセメント層形成用組成物を塗工し乾燥して厚さが０．６５ｍｍのポリマーセメント層２を２層形成した（２層厚さ１．３０ｍｍ）。その後、そのポリマーセメント層２上に、実施例１で用いた樹脂層形成用組成物を塗工し乾燥して厚さ５０μｍの樹脂層３を２層形成した（２層厚さ１００μｍ）。各層の形成は、約２５℃に管理された工場内の連続塗工乾燥装置で行った。実施例１で用いたこうして合計厚さ１．４０ｍｍの構造物保護シート１を作製した。なお、この構造物保護シート１も、工場内で連続生産され、離型シート４を含んだ態様でロール状に巻き取った。 [Example 2]
The composition for forming a polymer cement layer used in Example 1 was applied and dried to form two polymer cement layers 2 each having a thickness of 0.65 mm (two layers having a thickness of 1.30 mm). Thereafter, the resin layer forming composition used in Example 1 was applied onto the polymer cement layer 2 and dried to form two resin layers 3 having a thickness of 50 μm (two layers having a thickness of 100 μm). Formation of each layer was performed in a continuous coating drying device in a factory controlled at about 25°C. In this way, the structure protection sheet 1 used in Example 1 and having a total thickness of 1.40 mm was produced. Note that this structure protection sheet 1 was also continuously produced in a factory, and was wound up into a roll including the release sheet 4.

［厚さバラツキの測定］
実施例１、２について、ロール状に巻き取った構造物保護シート１から、Ａ４サイズ程度（２００ｍｍ×３００ｍｍ）を切り出し、各部で１４箇所の厚さを測定し、その厚さバラツキを計算した。実施例１では、厚さバラツキが２６μｍであり、実施例２も厚さバラツキは２６μｍであった。 [Measurement of thickness variation]
For Examples 1 and 2, a piece of approximately A4 size (200 mm x 300 mm) was cut out from the structure protection sheet 1 wound into a roll, the thickness was measured at 14 points in each part, and the thickness variation was calculated. In Example 1, the thickness variation was 26 μm, and in Example 2, the thickness variation was also 26 μm.

［実施例３～５］
実施例１において、構造物保護シート１の合計厚さを変化させた。実施例３は、厚さ０．６６ｍｍのポリマーセメント層２と、厚さ１００μｍの樹脂層３とを積層した合計厚さ０．７６ｍｍの構造物保護シート１を作製した。実施例４は、厚さ０．９６ｍｍのポリマーセメント層２と、厚さ１００μｍの樹脂層３とを積層した合計厚さ１．０６ｍｍの構造物保護シート１を作製した。実施例５は、厚さ１．４７ｍｍのポリマーセメント層２と、厚さ１００μｍの樹脂層３とを積層した合計厚さ１．５７ｍｍの構造物保護シート１を作製した。それ以外は実施例１と同様とした。 [Examples 3 to 5]
In Example 1, the total thickness of the structure protection sheet 1 was varied. In Example 3, a structure protection sheet 1 with a total thickness of 0.76 mm was produced by laminating a polymer cement layer 2 with a thickness of 0.66 mm and a resin layer 3 with a thickness of 100 μm. In Example 4, a structure protection sheet 1 with a total thickness of 1.06 mm was produced by laminating a polymer cement layer 2 with a thickness of 0.96 mm and a resin layer 3 with a thickness of 100 μm. In Example 5, a structure protection sheet 1 with a total thickness of 1.57 mm was produced by laminating a polymer cement layer 2 with a thickness of 1.47 mm and a resin layer 3 with a thickness of 100 μm. The rest was the same as in Example 1.

［強度と水蒸気透過率］
実施例３～５について、強度と水蒸気透過率を測定した。強度は引張試験機（株式会社島津製作所製、ＡＧＳ－Ｊ）で測定した破断強度で評価した。水蒸気透過率（ＷＶＴＲ）は、「透湿度」とも呼ばれ、１ｍ２のフィルム（構造物保護シート１）を２４時間で透過する水蒸気の量をグラム数で表すものであり、ｇ／ｍ２・ｄａｙ又はｇ／ｍ２／ｄａｙで表す。水蒸気バリア性を示す指標として用いられている。ＪＩＳ Ｋ ７１２９に準拠した方法で測定した。 [Strength and water vapor transmission rate]
The strength and water vapor permeability of Examples 3 to 5 were measured. The strength was evaluated by the breaking strength measured with a tensile tester (AGS-J, manufactured by Shimadzu Corporation). Water vapor transmission rate (WVTR) is also called "moisture permeability" and is expressed in grams as the amount of water vapor that permeates through 1 m 2 of film (structure protection sheet 1 ) in 24 hours. Expressed in day or g/m 2 /day. It is used as an indicator of water vapor barrier properties. It was measured by a method based on JIS K 7129.

測定結果は、実施例３では、強度が８．５Ｎ、水蒸気透過率が１８．２ｇ／ｍ２・ｄａｙであった。実施例４では、強度が１４．７Ｎ、水蒸気透過率が１３．０ｇ／ｍ２・ｄａｙであった。実施例５では、強度が２１．１Ｎ、水蒸気透過率が１０．２ｇ／ｍ２・ｄａｙであった。いずれの厚さでも強度と水蒸気透過率は問題なく、使用可能であった。 As for the measurement results, in Example 3, the strength was 8.5 N and the water vapor permeability was 18.2 g/m 2 ·day. In Example 4, the strength was 14.7 N and the water vapor permeability was 13.0 g/m 2 ·day. In Example 5, the strength was 21.1 N and the water vapor permeability was 10.2 g/m 2 ·day. Regardless of the thickness, the strength and water vapor permeability were satisfactory and could be used.

［比較例１］
現場でコンクリート上にスプレー塗工する作業を再現した。約２５℃程度に管理した作業環境で、コンクリート板上にスプレー塗りでエポキシ樹脂からなる下塗り層２２を形成し、工程紙上にスプレー塗り１層からなる厚さ１．４７ｍｍのポリマーセメント層２を形成し、その上にスプレー塗り１層からなる厚さ１００μｍの樹脂層３を形成した。各層は、塗工後の放置時間（常温、１２時間）と乾燥（４０℃、２４時間）の関係で、２日で１層とした。ポリマーセメント層２と樹脂層３との合計厚さは１．５７ｍｍであった。乾燥後、工程紙上からポリマーセメント層２と樹脂層３との積層体である塗装膜を剥がし、引張試験機（株式会社島津製作所製、ＡＧＳ－Ｊ）で引張破断強度を評価した。 [Comparative example 1]
The process of spray painting on concrete was recreated on site. In a work environment controlled at approximately 25 degrees Celsius, an undercoat layer 22 made of epoxy resin is formed by spray coating on the concrete plate, and a polymer cement layer 2 with a thickness of 1.47 mm consisting of one layer of spray coating is formed on the engineering paper. Then, a resin layer 3 having a thickness of 100 μm consisting of one layer of spray coating was formed thereon. Each layer was made into one layer in 2 days due to the relationship between the standing time after coating (normal temperature, 12 hours) and drying (40° C., 24 hours). The total thickness of polymer cement layer 2 and resin layer 3 was 1.57 mm. After drying, the coating film, which is a laminate of polymer cement layer 2 and resin layer 3, was peeled off from the engineering paper, and the tensile strength at break was evaluated using a tensile tester (AGS-J, manufactured by Shimadzu Corporation).

［比較例２］
比較例１において、約４０℃程度に管理した作業環境で作業した。スプレー塗り２層からなる厚さ１．１８ｍｍのポリマーセメント層２と、スプレー塗り２層からなる厚さ１００μｍの樹脂層３とを形成し、構造物保護シート１の合計厚さを１．２８ｍｍとした。それ以外は比較例１と同様とした。 [Comparative example 2]
In Comparative Example 1, work was carried out in a work environment controlled at about 40°C. A polymer cement layer 2 with a thickness of 1.18 mm consisting of two spray-coated layers and a resin layer 3 with a thickness of 100 μm consisting of two spray-coated layers are formed, so that the total thickness of the structure protection sheet 1 is 1.28 mm. did. The rest was the same as Comparative Example 1.

［比較例３］
比較例３において、約１０℃程度に管理した作業環境で作業した。スプレー塗り２層からなる厚さ１．２９ｍｍのポリマーセメント層２と、スプレー塗り２層からなる厚さ１００μｍの樹脂層３とを形成し、構造物保護シート１の合計厚さを１．３９ｍｍとした。それ以外は比較例１と同様とした。 [Comparative example 3]
In Comparative Example 3, work was carried out in a work environment controlled at about 10°C. A polymer cement layer 2 with a thickness of 1.29 mm consisting of two spray-coated layers and a resin layer 3 with a thickness of 100 μm consisting of two spray-coated layers are formed, so that the total thickness of the structure protection sheet 1 is 1.39 mm. did. The rest was the same as Comparative Example 1.

［強度と水蒸気透過率］
比較例１～３について、上記実施例３～５と同様の強度と水蒸気透過率を測定した。測定結果は、比較例１では、強度が２１．１Ｎ、水蒸気透過率が１０．２ｇ／ｍ２・ｄａｙであった。比較例２では、強度が１６．２Ｎ、水蒸気透過率が１１．３ｇ／ｍ２・ｄａｙであった。比較例３では、強度が１７．８Ｎ、水蒸気透過率が１１．４ｇ／ｍ２・ｄａｙであった。比較例２は、塗工中の粘度上昇が激しく、使用時間はかなり短いと想定される。比較例３は、塗工乾燥後の表面が白っぽく変色した。比較例１～３のいずれも、現場でコンクリート上にスプレー塗工する作業を再現したものであるので、厚さバラツキは大きく、本発明の範囲である±１００μｍよりもかなり大きく、厚さバラツキは２２２μｍ（±１１１μｍ）～２６０μｍ（±１３０μｍ）の範囲内であった。 [Strength and water vapor transmission rate]
For Comparative Examples 1 to 3, the strength and water vapor permeability were measured in the same manner as in Examples 3 to 5 above. As for the measurement results, Comparative Example 1 had a strength of 21.1 N and a water vapor permeability of 10.2 g/m 2 ·day. In Comparative Example 2, the strength was 16.2 N and the water vapor permeability was 11.3 g/m 2 ·day. In Comparative Example 3, the strength was 17.8 N and the water vapor permeability was 11.4 g/m 2 ·day. In Comparative Example 2, the viscosity increases sharply during coating, and the usage time is assumed to be quite short. In Comparative Example 3, the surface became whitish and discolored after coating and drying. Comparative Examples 1 to 3 all reproduce the work of spray coating on concrete on site, so the thickness variation is large, much larger than ±100 μm, which is the range of the present invention, and the thickness variation is It was within the range of 222 μm (±111 μm) to 260 μm (±130 μm).

［実施例６］
（プレキャスト部材の作製）
プレキャスト部材３１は、図６（Ａ）に示す型枠２４を用い、図７に示す方法で製造した。プレキャスト部材３１の製造は、図６及び図７に示すように、実施例１で得られた保護シート１を型枠２４の内面に配置した後にその型枠内にコンクリート組成物２１’を流し込んで製造した。製造されたプレキャスト部材３１は、保護シート１がその表面の一部又は全部に設けられる。 [Example 6]
(Production of precast member)
The precast member 31 was manufactured by the method shown in FIG. 7 using the formwork 24 shown in FIG. 6(A). As shown in FIGS. 6 and 7, the precast member 31 is manufactured by placing the protective sheet 1 obtained in Example 1 on the inner surface of the formwork 24, and then pouring the concrete composition 21' into the formwork. Manufactured. The manufactured precast member 31 is provided with the protective sheet 1 on a part or all of its surface.

［実施例７］
実施例２で得られた保護シート１を用いて、実施例６と同様にしてプレキャスト部材３１を製造した。 [Example 7]
Using the protective sheet 1 obtained in Example 2, a precast member 31 was manufactured in the same manner as in Example 6.

［比較例４］
実施例６、７で用いた保護シート１に代えて、特開２００４－３６０９７号公報の第００５２～００５４段落の保護シート１を用いた。この保護シート１は、フッ素樹脂フィルムと接着剤層とで構成されており、プレキャスト部材３１は、接着剤層側をコンクリート２１上に貼り合わせて製造した。 [Comparative example 4]
In place of the protective sheet 1 used in Examples 6 and 7, the protective sheet 1 described in paragraphs 0052 to 0054 of JP-A No. 2004-36097 was used. This protective sheet 1 is composed of a fluororesin film and an adhesive layer, and the precast member 31 was manufactured by bonding the adhesive layer side onto the concrete 21.

［密着性評価］
実施例６、７で形成したプレキャスト部材３１と、比較例４で形成したプレキャスト部材３１について、コンクリート２１と保護シート１との密着性を評価した。密着性は、コンクリート２１上の保護シート１を１８０°方向に引きはがす方法で行った。定性試験ではあったが、実施例６、７のプレキャスト部材３１は、ポリマーセメント層２がコンクリート２１表面に残る層間剥離であり、コンクリート２１と保護シート１との界面は、強く接着していることがわかった。一方、比較例４のプレキャスト部材３１は、保護シート１を構成する接着剤層と、コンクリート２１との界面で剥離しており、保護シート１とコンクリート２１とは、実施例１、２ほど強く接着していないことがわかった。 [Adhesion evaluation]
The adhesion between the concrete 21 and the protective sheet 1 was evaluated for the precast members 31 formed in Examples 6 and 7 and the precast member 31 formed in Comparative Example 4. Adhesion was tested by peeling off the protective sheet 1 on the concrete 21 in a 180° direction. Although this was a qualitative test, in the precast members 31 of Examples 6 and 7, the polymer cement layer 2 remained on the surface of the concrete 21 with delamination, and the interface between the concrete 21 and the protective sheet 1 was strongly adhered. I understand. On the other hand, the precast member 31 of Comparative Example 4 peeled off at the interface between the adhesive layer constituting the protective sheet 1 and the concrete 21, and the protective sheet 1 and the concrete 21 were bonded as strongly as in Examples 1 and 2. I found out that I didn't.

１ 構造物保護シート
２ ポリマーセメント層
３ 樹脂層
４ 離型シート
２１ 構造物（コンクリート）
２１’ コンクリート組成物（構造物形成組成物）
２２ 下塗り層
２３ 接着剤
２４ 型枠
３１ プレキャスト部材
 1 Structure protection sheet 2 Polymer cement layer 3 Resin layer 4 Release sheet
21 Structures (concrete)
21' Concrete composition (structure forming composition)
22 Undercoat layer 23 Adhesive 24 Formwork
31 Precast members

Claims (10)

ポリマーセメント層と、該ポリマーセメント層上に設けられた樹脂層とを備えた構造物保護シートであって、
前記樹脂層の厚みが５０～１５０μｍであり、
ロール状に巻き取られうる
ことを特徴とする構造物保護シート。 A structure protection sheet comprising a polymer cement layer and a resin layer provided on the polymer cement layer,
The thickness of the resin layer is 50 to 150 μm,
Can be wound into a roll
A structure protection sheet characterized by: 前記構造物保護シートの厚さ分布が±１００μｍ以内である、請求項１記載の構造物保護シート。 The structure protection sheet according to claim 1, wherein the structure protection sheet has a thickness distribution within ±100 μm. 前記ポリマーセメント層と前記樹脂層の両層が、それぞれ、単層で形成されているか又は積層として形成されている、請求項１又は２に記載の構造物保護シート。 The structure protection sheet according to claim 1 or 2, wherein both the polymer cement layer and the resin layer are each formed as a single layer or as a laminate. 前記ポリマーセメント層は、セメント成分を含有する樹脂で形成された層である、請求項１～３のいずれか１項に記載の構造物保護シート。 The structure protection sheet according to any one of claims 1 to 3, wherein the polymer cement layer is a layer formed of a resin containing a cement component. 前記ポリマーセメント層と前記樹脂層との一方の面に離型シートを備える、請求項１～４のいずれか１項に記載の構造物保護シート。 The structure protection sheet according to any one of claims 1 to 4, comprising a release sheet on one side of the polymer cement layer and the resin layer. 水蒸気透過率が１０～５０ｇ／ｍ２・ｄａｙの防水シートである、請求項１～５のいずれか１項に記載の構造物保護シート。 The structure protection sheet according to any one of claims 1 to 5, which is a waterproof sheet with a water vapor permeability of 10 to 50 g/m2·day. 請求項１～６のいずれか１項に記載の構造物保護シートを使用した施工方法であって、構造物上に接着剤を塗布した後に前記構造物保護シートを貼り合わせる、ことを特徴とする構造物保護シートの施工方法。 A construction method using the structure protection sheet according to any one of claims 1 to 6, characterized in that the structure protection sheet is bonded after applying an adhesive onto the structure. Construction method of structure protection sheet. 前記構造物と前記接着剤との間に下塗り層を設ける、請求項７に記載の構造物保護シートの施工方法。 The method for constructing a structure protection sheet according to claim 7, wherein an undercoat layer is provided between the structure and the adhesive. 請求項１～６のいずれか１項に記載の構造物保護シートが表面の一部又は全部に接着剤を介することなく設けられている、ことを特徴とするプレキャスト部材。 A precast member, characterized in that the structure protection sheet according to any one of claims 1 to 6 is provided on a part or all of the surface without using an adhesive. 構造物保護シートを型枠内面に配置した後に該型枠内にコンクリート形成用組成物を流し込んでプレキャスト部材を製造する方法であって、製造された前記プレキャスト部材は、前記構造物保護シートがその表面の一部又は全部に設けられ、前記構造物保護シートが、ポリマーセメント層と該ポリマーセメント層上に設けられる樹脂層とを備え、前記樹脂層の厚みが５０～１５０μｍであり、ロール状に巻き取られうる、ことを特徴とするプレキャスト部材の製造方法。 A method for producing a precast member by placing a structure protection sheet on the inner surface of a formwork and then pouring a concrete forming composition into the formwork, wherein the produced precast member is such that the structure protection sheet is The structure protection sheet is provided on a part or all of the surface, and includes a polymer cement layer and a resin layer provided on the polymer cement layer, the resin layer has a thickness of 50 to 150 μm, and is in a roll shape. 1. A method for manufacturing a precast member, characterized in that the precast member can be wound up .
JP2021533107A 2019-07-17 2020-07-17 Structure protection sheet, construction method using the same, precast member, and method for manufacturing precast member Active JP7442527B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2024023811A JP2024061725A (en) 2019-07-17 2024-02-20 Structure protection sheet, construction method and precast member using same, and manufacturing method of precast member

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2019132332 2019-07-17
JP2019132333 2019-07-17
JP2019132332 2019-07-17
JP2019132333 2019-07-17
PCT/JP2020/027758 WO2021010456A1 (en) 2019-07-17 2020-07-17 Structure protection sheet, execution method and precast member using structure protection sheet, and method for manufacturing precast member

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2024023811A Division JP2024061725A (en) 2019-07-17 2024-02-20 Structure protection sheet, construction method and precast member using same, and manufacturing method of precast member

Publications (2)

Publication Number Publication Date
JPWO2021010456A1 JPWO2021010456A1 (en) 2021-01-21
JP7442527B2 true JP7442527B2 (en) 2024-03-04

Family

ID=74210947

Family Applications (2)

Application Number Title Priority Date Filing Date
JP2021533107A Active JP7442527B2 (en) 2019-07-17 2020-07-17 Structure protection sheet, construction method using the same, precast member, and method for manufacturing precast member
JP2024023811A Pending JP2024061725A (en) 2019-07-17 2024-02-20 Structure protection sheet, construction method and precast member using same, and manufacturing method of precast member

Family Applications After (1)

Application Number Title Priority Date Filing Date
JP2024023811A Pending JP2024061725A (en) 2019-07-17 2024-02-20 Structure protection sheet, construction method and precast member using same, and manufacturing method of precast member

Country Status (8)

Country Link
US (1) US20220258378A1 (en)
EP (1) EP4000835A4 (en)
JP (2) JP7442527B2 (en)
CN (1) CN114174059A (en)
AU (1) AU2020314283A1 (en)
IL (1) IL289779A (en)
TW (2) TW202348383A (en)
WO (1) WO2021010456A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL295079A (en) * 2020-03-03 2022-09-01 Keiwa Incorporated Structure protection sheet, concrete block, and method for manufacturing reinforced structure
IL308578A (en) * 2021-05-31 2024-01-01 Keiwa Incorporated Structure protection sheet and method for producing reinforced structure
IL308573A (en) * 2021-05-31 2024-01-01 Keiwa Incorporated Structure protection sheet and method for using structure protection sheet
JP2023013731A (en) * 2021-07-16 2023-01-26 恵和株式会社 Structure protective sheet and manufacturing method of reinforced structure
JP2023018895A (en) * 2021-07-28 2023-02-09 恵和株式会社 Structure protective sheet and manufacturing method of reinforced structure
WO2023058726A1 (en) * 2021-10-07 2023-04-13 恵和株式会社 Structure protection sheet and method for installing structure protection sheet
WO2023074610A1 (en) * 2021-10-28 2023-05-04 恵和株式会社 Structure protection sheet and method for manufacturing reinforced structure
WO2023181384A1 (en) * 2022-03-25 2023-09-28 恵和株式会社 Method for protecting concrete column
WO2023238803A1 (en) * 2022-06-06 2023-12-14 恵和株式会社 Sheet for structure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005048367A (en) 2003-07-29 2005-02-24 Nitto Boseki Co Ltd Frp concrete anti-corrosive panel and its manufacturing method
CN201099947Y (en) 2007-10-11 2008-08-13 康根植 Water-proof coiled material
JP2009096171A (en) 2007-09-26 2009-05-07 Geostr Corp Manufacturing method of precast concrete product improved in roughness coefficient
JP2018059298A (en) 2016-10-04 2018-04-12 大日本印刷株式会社 Corrosion proof film

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5749058B2 (en) * 1974-06-15 1982-10-20
US4392335A (en) * 1982-04-12 1983-07-12 Astro-Steel Grip International, Inc. Flexible cementitious coatings
US5543188A (en) * 1992-08-25 1996-08-06 Te'eni; Moshe Flexible protective membrane particularly useful for waterproofing and protecting reinforced concrete bodies and metal pipes
JP3009544U (en) * 1994-09-28 1995-04-04 陸男 姫野 Surface finishing structure of ALC outer wall surface and covering sheet material used for this
JPH08217513A (en) * 1995-02-09 1996-08-27 Mitsubishi Chem Basf Co Ltd Polymer cement composition
JP3856065B2 (en) 1998-06-30 2006-12-13 東亞合成株式会社 Protection method for concrete structures
JP2004036097A (en) 2002-06-28 2004-02-05 Takenaka Komuten Co Ltd Decorative finish sheet, outer wall surface decorative finish sheet for building, and method for manufacturing concrete precast member
JP2004223999A (en) * 2003-01-27 2004-08-12 Shinjiro Cho Surface protection construction method, surface protection structure and surface protection sheet
JP2006070664A (en) * 2004-09-06 2006-03-16 Takenaka Komuten Co Ltd Waterproofing method
JP5376503B2 (en) * 2008-12-17 2013-12-25 株式会社ケー・エフ・シー Concrete repair method
JP4656264B2 (en) * 2009-05-29 2011-03-23 Ｄｉｃ株式会社 Surface-treated substrate, solar cell light-receiving surface side protective sheet using the same, and solar cell module
WO2011139466A1 (en) * 2010-04-28 2011-11-10 W.R. Grace & Co.-Conn. Waterproofing membrane
CN104025314B (en) * 2011-12-28 2016-08-17 三菱树脂株式会社 Screening glass
JP6174508B2 (en) * 2014-03-28 2017-08-02 バンポー工業株式会社 Reinforcement panel, method for manufacturing reinforcement panel, concrete structure, and method for constructing concrete structure
JP6630158B2 (en) * 2016-01-20 2020-01-15 積水化学工業株式会社 Protection method of hardened cement structure and protection structure of hardened cement structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005048367A (en) 2003-07-29 2005-02-24 Nitto Boseki Co Ltd Frp concrete anti-corrosive panel and its manufacturing method
JP2009096171A (en) 2007-09-26 2009-05-07 Geostr Corp Manufacturing method of precast concrete product improved in roughness coefficient
CN201099947Y (en) 2007-10-11 2008-08-13 康根植 Water-proof coiled material
JP2018059298A (en) 2016-10-04 2018-04-12 大日本印刷株式会社 Corrosion proof film

Also Published As

Publication number Publication date
US20220258378A1 (en) 2022-08-18
JP2024061725A (en) 2024-05-08
EP4000835A4 (en) 2023-08-02
WO2021010456A1 (en) 2021-01-21
AU2020314283A1 (en) 2022-02-03
TW202110640A (en) 2021-03-16
CN114174059A (en) 2022-03-11
IL289779A (en) 2022-03-01
JPWO2021010456A1 (en) 2021-01-21
TW202348383A (en) 2023-12-16
EP4000835A1 (en) 2022-05-25

Similar Documents

Publication Publication Date Title
JP7442527B2 (en) Structure protection sheet, construction method using the same, precast member, and method for manufacturing precast member
JP7323699B2 (en) Structural protection sheet, concrete block and method for manufacturing reinforced structure
JP2024010152A (en) Structure repair method
WO2023286561A1 (en) Structure protection sheet, and production method for reinforced structure
WO2022255145A1 (en) Structure protection sheet, and method for manufacturing reinforced structure
WO2023074610A1 (en) Structure protection sheet and method for manufacturing reinforced structure
TW202423644A (en) Structural protection sheet, construction method using the structural protection sheet, precast component, and method for manufacturing the precast component
WO2023008097A1 (en) Structure protection sheet, and method for manufacturing reinforced structure
TWI833190B (en) Roof repair methods and roof repair structures
WO2023181379A1 (en) Creasing member, creasing member attachment method, and structure protection sheet construction method
JP2022184760A (en) Structure protection sheet and method for manufacturing reinforced structure
JP7508344B2 (en) Water dripping material, method for attaching water dripping material, and method for installing structure protection sheet
JP2023066394A (en) Structure protection sheet and method for manufacturing reinforced structure
WO2023080133A1 (en) Structure protection sheet and method for protecting surface of structure
WO2023058726A1 (en) Structure protection sheet and method for installing structure protection sheet
WO2023181381A1 (en) Roof repair method
WO2023181384A1 (en) Method for protecting concrete column
TW202417719A (en) Methods for repairing structures and structures for repairing structures
TW202340591A (en) Method for protecting concrete column capable of greatly reducing the construction time when a protective layer is provided to the surface of an existing concrete column and protecting the existing concrete column over an extended period of time
JP2022175085A (en) Construction method of smoother and protective sheet
JP2023152559A (en) Construction method of structure protection sheet
TW202340578A (en) Drainage component, applying method of the same and construction method of structure protection sheet wherein the structure protection sheet includes a polymeric adhesive curing layer and a resin layer
JP2023056514A (en) Structure protection sheet and construction method of structure protection sheet

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20230125

A871 Explanation of circumstances concerning accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A871

Effective date: 20230125

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20230228

A601 Written request for extension of time

Free format text: JAPANESE INTERMEDIATE CODE: A601

Effective date: 20230410

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20230523

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20230801

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20230804

A601 Written request for extension of time

Free format text: JAPANESE INTERMEDIATE CODE: A601

Effective date: 20230908

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20231106

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20240123

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20240220

R150 Certificate of patent or registration of utility model

Ref document number: 7442527

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150